How can I create httpBody correctly?

Question

I want to create the body of POST method with

Content-Type: application/x-www-form-urlencoded

I'have got a dictionary

let params = ["key":"val","key1":"val1"]

I've tried to convert and escape dictionary using URLComponents. But have not found in the HTTP specifications those escape methods are the same.

Does somebody know a correct solution to do this?

I've looked at

https://datatracker.ietf.org/doc/html/draft-hoehrmann-urlencoded-01

https://www.rfc-editor.org/rfc/rfc1866

https://www.rfc-editor.org/rfc/rfc1738

https://www.rfc-editor.org/rfc/rfc3986

@ReinierMelian yes. I'm not sure that URLComponents.query is a correct implementation — Vyacheslav, Dec 21 '17 at 09:56

clemens · Accepted Answer · 2017-12-21T10:11:15.103

3

You can and should create the body with NSURLComponents:

let components = NSURLComponents()

components.queryItems = [ 
    URLQueryItem(name: "key", value: "val"), 
    URLQueryItem(name: "key1", value: "val1")
]
if let query = components.query {
    let request = NSMutableURLRequest()

    request.url = ...
    request.allHTTPHeaderFields = [ "Content-Type": "application/x-www-form-urlencoded"]
    request.httpBody = query.data(using: .utf8)
}

NSURLComponents creates valid URLs from data, and parses valid URLs to its components. The body of a HTTP post request with the content type above should contain the parameters as URL query (see How are parameters sent in an HTTP POST request?).

NSURLComponents is a good choice because it ensures conformity to the standard.

see also: Wikipedia and W3C.

edited Dec 21 '17 at 10:11

answered Dec 21 '17 at 09:49

clemens

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I said I did the same. I'm not sure that this is a correct implementation – Vyacheslav Dec 21 '17 at 09:55
@clement I did the same. – Vyacheslav Dec 21 '17 at 10:03
the stackoverflow url is not a specification – Vyacheslav Dec 21 '17 at 10:04
`s/t/s/`; Than everything is fine. ;) – clemens Dec 21 '17 at 10:05
everything is fine. ;) > nice evidence ;) – Vyacheslav Dec 21 '17 at 10:08
1

i just upvote due to you did some work but this is not the answer – Vyacheslav Dec 21 '17 at 10:08
I've added a link to the W3C standard, and hope fine things become better. ;) – clemens Dec 21 '17 at 10:14
1

10x. Ok. You won :) – Vyacheslav Dec 21 '17 at 10:40
@clemens URLQueryItem only supports String type but what about handling other types? – Md Imran Choudhury Sep 11 '20 at 14:11
You have convert them to strings. – clemens Sep 11 '20 at 15:33

How can I create httpBody correctly?

1 Answers1